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diff --git a/schema/sdss5db/catalogdb/sdss5db.catalogdb_lite.pdf b/schema/sdss5db/catalogdb/sdss5db.catalogdb_lite.pdf
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diff --git a/schema/sdss5db/targetdb/sdss5db.targetdb.pdf b/schema/sdss5db/targetdb/sdss5db.targetdb.pdf
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diff --git a/schema/sdss5db/update_graphs.py b/schema/sdss5db/update_graphs.py
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index 00000000..18f7176e
--- /dev/null
+++ b/schema/sdss5db/update_graphs.py
@@ -0,0 +1,57 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+#
+# @Author: José Sánchez-Gallego (gallegoj@uw.edu)
+# @Date: 2020-05-04
+# @Filename: update_graphs.py
+# @License: BSD 3-clause (http://www.opensource.org/licenses/BSD-3-Clause)
+
+# This script generates the schema graphs for catalogdb (full and lite)
+# and targetdb. It requires graphviz to be installed with support for PDF.
+# Accepts a single, optional argument, the name of the profile to use to
+# connect to the database.
+
+import os
+import sys
+
+from sdssdb.peewee.sdss5db import database
+from sdssdb.utils.schemadisplay import create_schema_graph
+
+
+def create_graphs():
+
+    cwd = os.path.dirname(os.path.realpath(__file__))
+
+    cdb_graph = create_schema_graph(base=catalogdb.CatalogdbModel,
+                                    show_columns=True,
+                                    skip_tables=['galactic_genesis_big',
+                                                 'galactic_genesis'],
+                                    graph_options={'rankdir': 'TB'})
+    cdb_graph.write_pdf(f'{cwd}/catalogdb/sdss5db.catalogdb.pdf')
+
+    cdb_lite_graph = create_schema_graph(base=catalogdb.CatalogdbModel,
+                                         show_columns=False,
+                                         skip_tables=['galactic_genesis_big',
+                                                      'galactic_genesis'],
+                                         graph_options={'rankdir': 'TB',
+                                                        'ratio': 'compress',
+                                                        'size': '30!,20!'})
+    cdb_lite_graph.write_pdf(f'{cwd}/catalogdb/sdss5db.catalogdb_lite.pdf')
+
+    tdb_graph = create_schema_graph(base=targetdb.TargetdbBase,
+                                    show_columns=True,
+                                    graph_options={'rankdir': 'TB'})
+    tdb_graph.write_pdf(f'{cwd}/targetdb/sdss5db.targetdb.pdf')
+
+
+if __name__ == '__main__':
+
+    if len(sys.argv) == 2:
+        database.set_profile(sys.argv[1])
+
+    assert database.connected, 'database is not connected'
+
+    # Import modules here to make sure all the relational tables are loaded.
+    from sdssdb.peewee.sdss5db import catalogdb, targetdb
+
+    create_graphs()